Cesium is not defined

i’m trying to use cesium with openlayers Library

but i get this error

can you help me i’m using typescript for development

that’s the code I’m using ::

https://github.com/openlayers/ol-cesium/blob/master/examples/rotate.js

thanks

Make sure you follow their setup guide. You might also find this thread useful:

https://groups.google.com/d/msg/cesium-dev/EqwHCz_dFi8/c5M4QbBBAgAJ

If it’s still not working, I’d post on their GitHub repo asking. It might be that they need to update their setup instructions.